Piston-ring compressor



L. J. GENETT. PISTON mm; COMPRESSOR. APPUCATION FILED MAR. 3 I919.

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Patented Apr. 25, 1922.

f 9 6 J I i a [citizen of the United States, residing at entry into the cylinder,leaving it properly ,STAEES,

Lofns' a. GENETT,

or vrAnoUnrrnjrIcHIs-AN,'essrenort 10 v" ONE-,HALF mo 1 v IaQNGYEAR, 'zm 'for MABQUETTE, MICHIGAN.

rrsronrnrne COMPRESSOR.

To all whom it mag ooncem:

.Be it kno that 1., Louis Mar uette, in the county of cMa-rquetteand the tateof Michigan, have-invented certain new and usefulrlmprovements in Piston- Ring Compressors, Off=Wl1lCh the followillgis a specificatiomreferencebeing had to. the accompanying drawings, forming a partithere of. v

This invention relatesto adevice for facilitating the insertion of a piston into the cylinder of a ,pump or-engine with its one '7 or more metallic packing rings ,properlyassembled in their respective grooves. It consists of means :for temporarily compressing-a piston ring to substantially the size of the piston so that the ring will readily enter. the cylinder and the invention involves various features and, elements of construction! as here inafter described and shown inthe drawings, and as indicatedby the claims.

In the Cll'tLWiIlgSfi Figure 1 is a plan view of a device: em bodying this invention, shown withthe cover plate removed to disclose certain interior construction. i q p i Figure '2 is janIe terior 'plan View of the device showing the compressor strap in 013- ency to expand slightly beyond the size of the piston soias to contactyieldingly but firmly with the cylinder wall to form a gas tight joint between the piston and the cylinder. The assembly of the parts is a matter of some difliculty, particularly in a multicylinder engine, and obviously involves compressing each piston ring just prior to its lodged in its groove in the piston and,at' the same time, overcomlng ts expans ve tend- Specification of Letters m r. Pflfiwql 1 Aliplication .filed'MaruhjSl, 1919. Serial No. 286,3 3'1.-

device consists in a frame, lyandpa flexible Strap, 2, one end of which is merely attached to the frame, while :the othervend 'isadjustably secured so that ai: ter said strap, 2, has been placed around ftheLpisto-n ring wh-ichis to be compressed, the adjusting :means may be operated for drawing the strap tight and thus compressing the ring day the desired amount.-" Asshjown in the drawings, :the frame, 1, is provided with a handle,-3,.and the adjusting means .'for-the"strap,12, consists ofa winding drumfil, carried on .a-spindle,i5, which is j ournaled in the frame, '1, catr6,-and .in .a 'cover plate .7, a at the drum, .4, being rhou'sedrin y a recess, 9, in the frame underlsaid cover plate. A ratchet wheel, 10, is rigidly associated with the winding, drum, :4,- and; afdetent d0g',-' 1=1, :is yieldingly pressed into engagement with sald ratchet wheel bya spring, 12, forpre venting reversal of the winding ,drum, 4:, when 1t -1s-be1ng ,rotatedinthe direction for along the handle, .3, beyond the cover plate, 7, ,the said dog, 11, may be released to-perg mit reversal of the winding drum,&,,f r-,r

on t e an o l he dog; l ex ending "out 1 enlarging theloop formediby thestrap. Any

suitable handle or crank may be provided for the spindle, 5, for'rota'ting the winding drum, 4; the drawing shows 'ahandle member, l'hsimilarin shape-tea clock winding key and secured to the spindle, 5,f0r this purpose; I

lion and has one e'nd "permanently hitch d to thedrum, 4, at15, the strap emerging from the chamber, 9, through a' slot, 16, formed in the frame, 1, and closed by the cover plate, 7 Said slot, 16, hasa fiaring p mouth, 17 withone face, 18, suitably rounded'to support the ribbon, 2, when it is con-, siderably deflected from the'lineof the slot,

Th strap, i2,l s p efe y a metall "ri 95 f 16,- so as to extend tangent to the circle of the piston ring for encompassing the latter."

Theopposite end of the strap is formed with an enlargement, 19, madeby doubling hack the strap upon itself'in a small loop, and at the other side fromtheslot, 16, the frame, 1,

is formed with a short slot, 20, and recess, 21, in which the enlargement, 19, on the adjacent portion of the strap may be entered edgewise for anchoring the free end of the strap prior to drawing it tight around the piston ring.

Figure 3 indicates the relation of the partswhen the strap, 2, has been drawn tight around a piston ring, A, on a piston, B. The ring, A, being thus compressed to the same diameter as the piston B, and a part of the ring projecting in Figure '3 slightly above the edge of the compressor strap, 2, it is evident that the piston may now be entered in the cylinder, C, until the upper edge of the compressor strap engages the lower edge of the c linder block, whereupon said strap may be s idably moved down over the piston, B, the ring, A, being by that time in full control of the cylinder wall. This having been done with the uppermost ring on the piston, if there are additional rings, the process can be repeated by first slightly loosening the strap, 2, and causing it to encompass the next ring on the piston, then sliding it longitudinally over the ring as the latter is gradually entered in the cylinder, C. When the piston with all its rings has beenentered in'the cylinder the device may be removed by disengaging the enlargement, 19, at the free end of the strap, 2, from the recess, 21, and the slot, 20, and thus drawing the strap around the piston and free of said parts.

I claim:

1. Apiston ring compressor comprising a frame, a fully rotatable circular winding drum thereon and a flexible loop continuous from end to end, having one end attached to the frame and the other end hitched to the drum so that rotation of the drum will ad just and tighten the loop.

2. A piston ring compressor comprising a frame, a fully rotatable circular winding drum thereon, a flexible loop continuous I y from end to end having one end attached to the frame and the other end hitched to the drum to permit adj ust-ment in the size of the loop, a ratchet wheel concentric with the drum and attached thereto, and a detent on the frame adapted to engage the ratchet wheel for holding the loop in adjustment.

enlcrgement, said frame having a recess to accommodate said enlargement with a slot leading therefrom for the ribbon, said recess and slot being laterally accessible to the ribbon for detachably anchoring the end of the latter on the frame.

4. A piston ring compressor comprising a frame, a winding drum journaled on said frame with its face against a flat surface thereof, a flat metal ribbon wound on said drum and forming a flexible loop with its outer end engaged with the frame, said drum having'a ratchet wheel rigidly associated with it at the opposite side from said flat face of the frame, and of larger diameter than the drum, to serve as a flange therefor to guide said ribbon on the drum, and a, de tent on the frame for said ratchet wheel.

5. A piston ring compressor comprising a frame with a handle, a winding drum on the frame, and a flexible loop having one end attached to the frame and the other end hitched to the drum for varying the size of said loop, together with a ratchet wheel and a spring-pressed detent mounted on the frame for automatically maintaining the drum in adjustment, and a trip finger extending adjacent the handle for releasing said detent at will.

6. A piston ring compressor comprising a frame with a housing formed therein, a handle projecting therefrom and a cover for the housing; a winding drum having its shaft journaled in said housing and cover and with a ratchet wheel 7 and detent en- Y Louis J. GENETT. 

